3 * ( [ -c ] [ -r role ] [-t type] [ -u user ] [ -l levelrange ] )
4 * command [arg1 [arg2 ...] ]
6 * attempt to run the specified command with the specified context.
8 * -r role : use the current context with the specified role
9 * -t type : use the current context with the specified type
10 * -u user : use the current context with the specified user
11 * -l level : use the current context with the specified level range
12 * -c : compute process transition context before modifying
14 * Contexts are interpreted as follows:
23 * 4 Y user:role:type:range
26 * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
27 * - based on coreutils-5.97 (in Fedora Core 6)
29 * Licensed under GPLv2, see file LICENSE in this source tree.
31 //config:config RUNCON
32 //config: bool "runcon"
34 //config: depends on SELINUX
36 //config: Enable support to run command in specified security context.
38 //config:config FEATURE_RUNCON_LONG_OPTIONS
39 //config: bool "Enable long options"
41 //config: depends on RUNCON && LONG_OPTS
43 //config: Support long options for the runcon applet.
45 //applet:IF_RUNCON(APPLET(runcon, BB_DIR_USR_BIN, BB_SUID_DROP))
47 //kbuild:lib-$(CONFIG_RUNCON) += runcon.o
49 //usage:#define runcon_trivial_usage
50 //usage: "[-c] [-u USER] [-r ROLE] [-t TYPE] [-l RANGE] PROG ARGS\n"
51 //usage: "runcon CONTEXT PROG ARGS"
52 //usage:#define runcon_full_usage "\n\n"
53 //usage: "Run PROG in a different security context\n"
54 //usage: "\n CONTEXT Complete security context\n"
55 //usage: IF_FEATURE_RUNCON_LONG_OPTIONS(
56 //usage: "\n -c,--compute Compute process transition context before modifying"
57 //usage: "\n -t,--type=TYPE Type (for same role as parent)"
58 //usage: "\n -u,--user=USER User identity"
59 //usage: "\n -r,--role=ROLE Role"
60 //usage: "\n -l,--range=RNG Levelrange"
62 //usage: IF_NOT_FEATURE_RUNCON_LONG_OPTIONS(
63 //usage: "\n -c Compute process transition context before modifying"
64 //usage: "\n -t TYPE Type (for same role as parent)"
65 //usage: "\n -u USER User identity"
66 //usage: "\n -r ROLE Role"
67 //usage: "\n -l RNG Levelrange"
70 #include <selinux/context.h>
71 /* from deprecated <selinux/flask.h>: */
72 #undef SECCLASS_PROCESS
73 #define SECCLASS_PROCESS 2
77 static context_t runcon_compute_new_context(char *user, char *role, char *type, char *range,
78 char *command, int compute_trans)
81 security_context_t cur_context;
83 if (getcon(&cur_context))
84 bb_error_msg_and_die("can't get current context");
87 security_context_t file_context, new_context;
89 if (getfilecon(command, &file_context) < 0)
90 bb_error_msg_and_die("can't retrieve attributes of '%s'",
92 if (security_compute_create(cur_context, file_context,
93 SECCLASS_PROCESS, &new_context))
94 bb_error_msg_and_die("unable to compute a new context");
95 cur_context = new_context;
98 con = context_new(cur_context);
100 bb_error_msg_and_die("'%s' is not a valid context", cur_context);
101 if (user && context_user_set(con, user))
102 bb_error_msg_and_die("can't set new user '%s'", user);
103 if (type && context_type_set(con, type))
104 bb_error_msg_and_die("can't set new type '%s'", type);
105 if (range && context_range_set(con, range))
106 bb_error_msg_and_die("can't set new range '%s'", range);
107 if (role && context_role_set(con, role))
108 bb_error_msg_and_die("can't set new role '%s'", role);
113 #if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
114 static const char runcon_longopts[] ALIGN1 =
115 "user\0" Required_argument "u"
116 "role\0" Required_argument "r"
117 "type\0" Required_argument "t"
118 "range\0" Required_argument "l"
119 "compute\0" No_argument "c"
120 "help\0" No_argument "h"
124 #define OPTS_ROLE (1<<0) /* r */
125 #define OPTS_TYPE (1<<1) /* t */
126 #define OPTS_USER (1<<2) /* u */
127 #define OPTS_RANGE (1<<3) /* l */
128 #define OPTS_COMPUTE (1<<4) /* c */
129 #define OPTS_HELP (1<<5) /* h */
130 #define OPTS_CONTEXT_COMPONENT (OPTS_ROLE | OPTS_TYPE | OPTS_USER | OPTS_RANGE)
132 int runcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
133 int runcon_main(int argc UNUSED_PARAM, char **argv)
139 char *context = NULL;
145 #if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
146 applet_long_options = runcon_longopts;
148 opt_complementary = "-1";
149 opts = getopt32(argv, "r:t:u:l:ch", &role, &type, &user, &range);
152 if (!(opts & OPTS_CONTEXT_COMPONENT)) {
155 bb_error_msg_and_die("no command given");
159 con = context_new(context);
161 bb_error_msg_and_die("'%s' is not a valid context", context);
163 con = runcon_compute_new_context(user, role, type, range,
164 argv[0], opts & OPTS_COMPUTE);
167 if (security_check_context(context_str(con)))
168 bb_error_msg_and_die("'%s' is not a valid context",
171 if (setexeccon(context_str(con)))
172 bb_error_msg_and_die("can't set up security context '%s'",
175 BB_EXECVP_or_die(argv);